Question

you want to build a computer with a smaller case that is designed to be placed on desktops in a flat or upright position. which case type should you select?
htpc
atx full - tower
micro - atx slim tower
atx mid - tower

Explanation:

HTPC (Home Theater Personal Computer) cases are designed to be small and can be placed flat or upright on desktops. ATX full - tower, micro - ATX slim tower, and ATX mid - tower are generally larger and not as suitable for this specific desktop - placement requirement.

Answer:

HTPC